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This work studies the paper authentication problem by exploiting optical features through mobile imaging devices to characterize the unique, physically unclonable properties of paper surface. Prior work showing high matching accuracy either used a consumer-level scanner for estimating a projected normal vector field of the surface of the paper as the feature for authentication, or used an industrial...
Document scanning is a daily office work. However, traditional devices like flatbed scanners are not easy to carry for mobile work. In this paper, we present a new document image scanning method using a mobile device. With a clip of continuous video capturing, our approach first extracts several key-frames. A mobile GPU based image stitching method is adopted to generate a high resolution document...
This paper presents a vision-based user interface of a mobile robotic arm for people with severe disabilities. The main body of the robotic arm that can be contained in a laptop computer's briefcase is only 5 kg. The user interface using eye movements consists of a web camera, computer, and display unit. We also made a control box to detect user's eye movements. From the experimental results, it is...
This paper presents an image-based position measurement of underwater objects using a low-cost maritime mobile robot with a monocular camera. Visual recognition of distant underwater objects is possible in the water with high transparency, for example, in the coastal sea area of Okinawa prefecture, Japan. In this paper, we apply the proposed method to estimate the position of an old anchor that is...
The rate of mobile shopping has been increased since people are able to use the internet while walking on the street or taking public transportation. Many enterprises make efforts to build new business model to attract a mobile shoppers. Therefore, this paper intends to design an application, which is able to add products into mobile shopping cart by scanning the barcode through smartphone camera...
Nowadays, handheld devices such as smartphones provide users with multi-touch input screens. Displaying interactive and touch-enabled 3D environments in such handheld devices has become popular in different applications like games or virtual reality. Technologies such as Web3D and WebGL have made the creation and display of 3D environments in mobile devices easier than ever. However, object manipulation...
In this paper we present a novel method for the automatic analysis of mobile eye-tracking data in natural environments. Mobile eye-trackers generate large amounts of data, making manual analysis very time-consuming. Available solutions, such as marker-based analysis minimize the manual labour but require experimental control, making real-life experiments practically unfeasible. We present a novel...
In this paper, we introduce a new strategy of using VANET nodes with visual sensors and wireless transceivers to build an instant camera barrier for a given mission period. Given a set of properly equipped VANET nodes whose drivers voluntarily join the protocol by exposing their future travel plans and use onboard equipment to transmit realtime video to the authority, we aim to maintain the barrier...
Scientists and socialists have worked very hard to help the elderly and the disabled to adopt methods that can help them interact with society and smooth their mobility during everyday activities, rather than be dependent on others, or on using the traditional tools, mainly the wheelchair. However, this technology has basic drawbacks since the disabled still are not able to reach the wheelchair if...
This paper presents a novel approach for object identification and steady tracking in mobile augmented reality applications. First, the system identifies the object of interest using the KAZE algorithm. Then, the target tracking is enabled with the optical flow throughout the camera instant video stream. Further, the camera pose is determined by estimating the key transformation relating the camera...
Augmented Reality is one of the most fundamental enabling technologies of this era which modifies our perception to such an extent that we are able to see, hear and feel the ordinary everyday objects in a new and enriched way. This technology is an amalgamation of Real and Virtual Worlds which aims to enhance the physical information by exactly super-imposing the computer generated content on it....
Cognitive load refers to the amount of informationa person can process or hold in working memory. Historically, the psychology community has estimated this quantity objectively by monitoring the involuntary dilations and constrictions of the pupil using medical grade equipment known as pupillometers. At the same time, researchers in the HCI and Ubi Comp communities have hypothesized how cognitive...
Mobile navigation applications help improve the quality of life and self-confidence of visually impaired people. In order to understand the issues of communication between visually impaired user and mobile navigation application, qualitative analysis related to the structure of navigation process should be used. Therefore we propose a design of new usability evaluation tool that is based on the functional...
In this paper, a mobile augmented reality (AR) based system for individual location recommendation is proposed. The system consists of the modules of user location, marker detection, 3D display and location guide by combing AR with navigation technology. Experimental results demonstrate that the proposed system is both efficient and effective in helping people location their position, it also enhance...
In this system paper we present a novel approach for autonomous, mobile manipulation for agricultural robots. Our target application is mechanical weed control which for example is needed in organic farming. Today, this task is often performed by field workers, whose availability is declining and the quality of their work differs greatly. In addition, manual weeding is a very tedious task with adverse...
This paper proposes a method to analyse humanmade environments in order to identify ascending steps and stairs and recognize their parameters. The system uses adjustable 3D environment geometries for the detection of steps and estimates tread depth and width, riser height and yaw orientation from the camera to staircase. Those parameters are needed by humanoid robots to ensure a safe traversal of...
Capable mobile manipulators require sophisticated sensing and environment perception. An important task is the precise localization of objects to be handled. In order to be able to deal with a wide variety of applications, sensor systems need to be able to work with glossy, shiny or transparent objects. Here we present an approach to that problem based on analyzing specular reflections using a custom...
This paper proposes a method to analyse human-made environments in order to verify the presence of ascending steps or stairs. Our system is intended to assist visually impaired people by providing acoustic information about the scene in front of a low-resolution Time-of-Flight (ToF) camera that is fixed to a mobile vehicle (rollator). Detailed instructions to the user about potentially hazardous situations...
This paper proposes a methodology for visual tracking of a dynamic generalized subject within an unknown map, by relying on its perception as a separate entity which can be distinguished spatially and visually from its environment. To this purpose, a 3D-representation of the visible scenery is examined, and the subject is spatially identified by its externally viewed hull via a mesh-connection algorithm...
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